It's so simple, such a glaring, screaming metaphor of the gender fuck up on this planet.
Voting against women bishops says that women are not equal in the most important arena of all. Never mind the economic bollocks which we structure our working lives on and have to accept the glass ceilings of and all that. Not to mention the violence. Not to mention the humiliation and fear from child to adult.
This action shows clearly that in the eyes of those who have licked, slithered and back handed their way into a position of power in the synod (tippety top of career tree for the men in dresses) view women as less valuable less intelligent less able and further from god than men.
That's all.
Then again, if you want to use your intelligence, ability, compassion and vision of a better life for us all, whatever our gender.....you might have more chance of being of real value by attaching all that love and well meaning to something outside of religions of any and all descriptions, as these arena are surely the ones from which we desperately need to evolve.